Fireproof safe door



, Feb. 1,1927. @16,249 c. BARTELS v FIREPROOF SAFE DOOR N el,

noa/nto@ action of the springs 16 when the fusible material 13 has melted, thus establishing a tight tireproof sea-l through the doorway and preventing entrance of heat into the interior of the protected. structure. Cup 12 may be omitted and washer 13 plated with suitable material, such as nickel.

Preferably the valve door and abutments 17 are so located that under normal temperature conditions the valve door will not meet the shoulders when the door is closed, thus avoiding the bending of the springs 1G every time the door is opened or closed, which would tend to crystallize the springs and weaken them and shorten their life. However, if desired, the arrangen'ient can be Such that the valve door is moved slightly against the action of the springs 1G under nornial temperature vconditions and whenever the door is closed.

It will be noted that when the fusible material 18 has melted and flowed out of the cups 12, the valve door 4 will still be retained on the main door, by reason of the fact that the heads 11 of the screws are larger than'the apertures through the valve door wall. Thus the valve door will be held to the main door under all conditions.

To restore the door to original condition, it is only necessary to insert new pieces of fusible material 13 within the cups 12 and beneath the heads of the screws.

It will be apparent that the solder will fuse before the fire hazard has reached a great height, and thus the sealing of the doorway will be effected very quickly when a'fire hazard arises, and the sealing will not be delayed long enough to permit previous harm to the safe contents.

As many changes could be made in t-he above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying' drawingl shall be interpreted as illustrative and not in a limiting sense.

What I claim is 1. In a door of the character describethin combination, a main door, a valve door, a stud rigidly secured to the main door and abutting the valve door, a headed screw cngaging the stud, fusible material interina diate the headot' the screw and said valve door, and spring means for moving the valve door away from the main door and toward the head of said screw when said fusible material is melted.

2. In a door of t-he character described` in` combination, a main door, a valve door, a stud rigidly secured to the main door and abutting the valve door, aheaded screw engaging the stud, a cup intermediate the valve door and the head of the screw, fusible material in said cup, the shank of the screw extending through said fusible material and the bottom of the cup, and spring means for moving the valve door away from the main door and toward the head of the screw when said fusible material is melted.

This specification signed this 30 day of June, 1925.

CARL BARTELS. 

